The Bimini Pink Arag-Alive Live Reef Sand from CaribSea is a vibrant and biologically active substrate for saltwater aquariums. This live sand contains a diverse range of particle sizes, from tiny grains to larger shells, which create a natural environment that supports beneficial bacteria and encourages the growth of microfauna essential for reef tanks. It aids in the nitrogen cycle by housing millions of nitrifying bacteria that help break down waste products, making it ideal for new aquarium setups or as a refresher for established systems.